After 200 years of living in their own bubble, humanity was finally dragged back to Yamani due to their own negligence. Without their knowing, they are returned to the order of life of their ancestors. Humans are back to being slaves who can be enjoyed by all kinds of creatures. One year later, they realized that they were a small part of the humans who lived in that layer of soil, while the rest were still living safely on Earth. The announcement from the Queen awakens the fighting spirit of the old soldiers who want to return to their sins and save humanity. Without being able to realize that all of that is part of the great destruction that will come to them. The battle within the seven layers of hell has finally begun.
L-04 is an area surrounded by the ocean. The islands that are in the sea, or even those on it, live with a bubble that protects them. In L-04, all races that exist in Yamani live and work there peacefully; they respect each other and never discriminate between races.
After all, the only race that has been discriminated against in Yamani so far has been the human race.
However, ever since the disappearance of humans in the Yamani subsoil, the area has now started to tense up a bit, in particular for those who live on the subsoil's ceiling. In L-04, there is actually not too much difference in degrees; all kinds of creatures can live there and are free to choose any area. However, most of those who are known as merchants usually live on the ceiling of L-04, separated from the mainland, and have bubbles on their own small island.